Spectroscopic Classification of Five Supernova Candidates with the 2.5-m du Pont Telescope
ATel #12212; Subhash Bose (KIAA-PKU), Tom Holoien, Jeff Rich (Carnegie), Subo Dong, P. Chen (KIAA-PKU), Jose L. Prieto (UDP), K. Z. Stanek (OSU)
on 14 Nov 2018; 20:00 UT
Credential Certification: Subhash Bose (email@subhashbose.com)
We report spectroscopic observations and classifications of optical transients using the du Pont 2.5-m telescope (+ WFCCD) at Las Campanas Observatory. Targets were discovered by the All-Sky Automated Survey for Supernovae (ASAS-SN, Shappee et al. 2014) (ATel #12170, ATel #12147, ATel #12194), ATLAS survey (Tonry et al. 2011 and Tonry et al. ATel #8680) and the Zwicky Transient Facility (ZTF; ATel #11266). We used SNID (Blondin & Tonry, 2007, ApJ, 666, 1024) to identify the type, phase, and redshift of the SN spectra.
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Survey Name | IAU Name | Obsv. Date | Spec. Type | Phase | Redshift | Notes
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ASASSN-18yr | SN 2018hsh | 2018-11-11.03 | Ia | 0-5 days post-max. | 0.036962(NED) | (a)
ZTF18acbxsge| SN 2018huw | 2018-11-11.13 | Ia | 2-6 days pre-max. | 0.0034 |
ATLAS18wtl | SN 2018hjn | 2018-11-11.32 | Ia | ~10-15 days post-max. | 0.020811(NED) | (a)
ASASSN-18ya | SN 2018hkq | 2018-11-11.29 | Ia | 3-5 weeks after max. | 0.016598(NED) | (a,b)
ASASSN-18ze | SN 2018hxf | 2018-11-11.22 | young CCSN? | --- | | (c)
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(a) The redshift is for the host galaxy from NED. The SNID estimated redshift is consistent with that of the host galaxy.
(b) The spectrum is strongly contaminated by line features from host galaxy.
(c) The spectrum shows a almost featureless blue continuum, consistent with young CCSNe.